Major genetic changes in wheat with potential to affect disease tolerance

被引:32
作者
Foulkes, M. J. [1 ]
Paveley, N. D.
Worland, A.
Welham, S. J.
Thomas, J.
Snape, J. W.
机构
[1] Univ Nottingham, Sch Biosci, Loughborough LS12 5RD, Leics, England
[2] ADAS High Mowthorpe, Malton YO17 8BP, N Yorkshire, England
[3] John Innes Ctr, Norwich NR4 7UH, Norfolk, England
[4] Rothamsted Res, Harpenden AL5 2JQ, Herts, England
关键词
D O I
10.1094/PHYTO-96-0680
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Selection through plant breeding has resulted in most elite winter wheat germplasm in the United Kingdom containing the Rht-Dlb semi-dwarfing allele, the IBL. IRS chromosome arm translocation with rye, and an allele conferring suppression of awns. Near-isogenic lines (NILs) were used to test whether these major genetic changes have had any effect on disease tolerance. The ability of the NILs to tolerate epidemics of Septoria leaf blotch or stripe rust was measured in four field experiments over two seasons. Tolerance was quantified as yield loss per unit of green canopy area lost to disease. There was a trend for the presence of the IBL.IRS translocation to decrease tolerance; however, this was not consistent across experiments and there was no effect of semi-dwarfing. The awned NIL exhibited decreased tolerance compared with the unawned NIL. There were significant differences in tolerance between the cultivar backgrounds in which the NILs were developed. Tolerance was lower in the modern genetic background of Weston, released in 1996, than in the genetic background of Maris Hunstman, released in 1972. The data suggest that certain physiological traits were associated with the tolerance differences among the backgrounds in these experiments. Potential yield, accumulation of stem soluble carbohydrate reserves, and grain sink capacity were negatively correlated with tolerance, whereas flag leaf area was positively correlated.
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收藏
页码:680 / 688
页数:9
相关论文
共 42 条
[11]   DISEASE TOLERANCE - AN INDICATOR OF THRESHOLDS [J].
GAUNT, RE .
PHYTOPATHOLOGY, 1981, 71 (09) :915-916
[12]   DISEASE YIELD RELATIONSHIP IN BARLEY .2. CONTRIBUTION OF STORED STEM RESERVES TO GRAIN FILLING [J].
GAUNT, RE ;
WRIGHT, AC .
PLANT PATHOLOGY, 1992, 41 (06) :688-701
[13]  
GAY AP, 1998, 151 HGCA, V2
[14]   INFLUENCE OF FOLIAR APPLIED CHLORMEQUAT ON RADIATION ATTENUATION BY WINTER BARLEY CANOPIES [J].
GREEN, CF ;
DAWKINS, TCK ;
HUNTER, B .
JOURNAL OF AGRICULTURAL SCIENCE, 1985, 105 (AUG) :213-216
[16]   Small sample inference for fixed effects from restricted maximum likelihood [J].
Kenward, MG ;
Roger, JH .
BIOMETRICS, 1997, 53 (03) :983-997
[17]   Position of inoculum in the canopy affects the risk of septoria tritici blotch epidemics in winter wheat [J].
Lovell, DJ ;
Parker, SR ;
Hunter, T ;
Welham, SJ ;
Nichols, AR .
PLANT PATHOLOGY, 2004, 53 (01) :11-21
[18]  
MCKENDRY AL, 1994, CEREAL RES COMMUN, V22, P353
[19]  
*MIN AGR FISH FOOD, 1997, 141 MIN AGR FISH FOO
[20]  
Monsi M., 1953, JPN J BOT, V14, P22, DOI DOI 10.1093/AOB/MCI052